Improvement in steam-gage siphons



J. A. PRINDLE. Steam-Gage Siphon.

Patented .June 4.18.78'

WITNESSE I ENTOR UNITED STATES PATENT OFFICE.

JOHN A. PRINDLE, OF CLEVELAND, OHIO, ASSIGNOR OF ONE-HALF HIS RIGHT TOJAMES R. WORSWICK, OF SAME PLACE.

IMPROVEMENT IN STEAM-GAGE SIPHONS.

Specification forming part of Letters Patent N0. 204,449, dated June 4,1878 application filed April 15, 187s.

To all whom it may concern:

Be it known that I, JOHN A. PRINDLE, of Cleveland, in the county ofCuyahoga and State of Ohio, have invented certain new and usefulImprovements in Steam-Gage Siphons; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to 'the accompanying drawings,which form part of this specification.

My invention relates to a device for use in connection with steam-gages,whereby said gages shall be operated by a direct waterpressure; and saidinvention consists in a construction as follows: An induction-pipe, madein same piece with the condensingchamber, extends up within the latter,and terminates near its top. Over this pipe a casing is iitted, eitherwholly or partially surrounding the same, and adapted to form a steamspace between itself and the side of said induction-pipe. This spaceprovides passageway communicating from the top of the inductionpipe tothe bottom of the condensing-chamber.

In the drawings, Figure l represents one form of my invention, as shownin longitudinal section. Fig. 2 represents detached portions of mydevice, showing one form of its construction. Fig. 3 includes some ofvarious modiiications of which my device is susceptible.

A is the inlet-pipe; B, a cap, hood, thimble, or the like, eitherloosely or rigidly placed in connection with the inlet-pipe A. C is whatI term the steani-space,7 and D the condensing-chamber. E is the outlet,connected in any suitable manner with a gage.

The device just described may be placed anywhere between the gage andsource of pressure, and its operation is as follows: The steam from theboiler enters the inlet A, escapes into the steam-space C, and iscondensed in the chamber D. The water of condensation escapes at theoutlet E and impinges against the mechanism of the gage. This directwater-pressure is continued during the time that the pressure is keptup, but when the pressure is relieved the water will drain back into theboiler down to a level with the bottom of the cap or hood B.

This function constitutes an important feature of my device, as italways insures an emptying of the chamberD, which, if permitted to befilled with water, might be bursted by freezing.

l. A steam-gage siphon, consisting in the combination, with acondensing-chamber and steam induction-pipe terminating near its top, ofa casing made independent of said pipe, and forming a passage-way fromthe same to the bottom of the chamber, substantially as set forth.

2. In a steam-gage siphon, the combination, with a condensing-chamberand upright steaminduction pipe terminating near its top, of a thimbleor casing made independent of and ittin g about said induction-pipe, thesame forming an annular passage connecting the top of the induction-pipewith the bottom of the condensing-chamber, substantially as set forth.

3. In a steam-gage siphon, the combination, with a condensing-chamber,having a steam-induction pipe formed in same piece therewith, andterminating near its top, of a casing which wholly or partiallysurrounds the side of said pipe, and connects its open top with thebottom ofthe chamber, substantially as set forth.

4. In a steam-gage siphon, the combination, with a condensin g-chamber,having an upright steam-induction pipe made in same piece therewith, andterminating near its top, of a thimble made independent both of saidchamber and pipe, and tting over the latter, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JNO. A. PRINDLE.

Witnesses F. TOUMEY, W. E. DONNELLY.

